Apparatus for treating waxed webs



I April 26, 1938. A. IPOTDEVIN 2,115,283

APPARATUS FOR TREATING WAXED WEBS Filed May 51, 1955 7 INVENTOR. w W M,

Patented Apr. 26, 138

APPATUS FOR. EAG WAXED WEBS Adolph Potdevin, Garden fiity, N. Y.,assignor to Potdevin Machine Company, Brooklyn, N. Y., a corporation ofNew York Application May 31, 1935, Serial No. 24,294

11 Cla.

This invention relates to an apparatus for dissipating surface wax andis particularly directed to the dissipation or removal of portions ofwax from waxed paper and the like.

My invention is particularly well adapted for the dissipation of spotsor stripes of wax from waxed paper so as to accommodate or adapt thepaper to receive adhesive in such spots or stripes whereby the making ofbags, envelopes and the like is greatly facilitated.

In the making of bags and the like from a web of material such as paper,for example, a longitudinal stripe of adhesive is applied adjacent oneedge of the web so that when the same is formed into a tube, theadhesive stripe will overlie the opposed edge of the web and form alongitudinal seam. Likewise stripes or spots of adhesive are alsoapplied transversely of the web whereby when a bag length is severedfrom the tube one end may be folded over and secured to the body of thebag length to form a bottom.

When employing a web of waxed paper, however, the adhesive obviouslywill not adhere to the wax surface. My present invention contemplatesthe dissipation or removal of sufficient of the wax surface at thedesired points to enable adhesive to be applied thereto.

The accompanying drawing illustrates apparatus for carrying out myinvention in which drawing Fig. 1 is a diagrammatic side view of theapparatus;

Fig. 2 is a plan view partly in section; and

Fig. 3 is an elevational view of a webof waxed paper after being treatedin my apparatus.

Referring to the drawing in detail, l designates a supply roll of waxedpaper, the paper in web form being drawn continuously from this roll bydraw rollers or other suitable mechanism commonly used in paper handlingmachines, the

paper passing about a roller 3 and thence about.

a cylinder 4.

The cylinder 4 is provided with a shell 5 having longitudinallyextending channels 6, l, 8 and 9 equally spaced thereincircumferentially. These channels are adapted to receive removableheating elements I0, ll, l2 and I3, respectively, which are heatedelectrically as will be hereinafter explained. These heating elementscontact the web of Waxed paper as the same passes about the cylinder 4to dissipate or melt the surface wax where the paper contacts theheating elements to provide transverse stripes or unwaxed areas l4 inthe paper. It will be obvious that if longer stripes should be desiredsuch as indicated in dotted lines at IS in Fig. 3, it is merelynecessary to remove the relatively short heating elements and substitutelonger elements. Likewise, if shorter stripes or series of spots or anyother formation of unwaxed surface is desired, bars cor- (ei. si is)responding to such formation may be substituted.

The heating or resistance elements it, H, l2 and B3 are in an electriccircuit which may be traced as follows: From a source of supply throughconductor 20, switch blade 2!, conductor 22 to commutator brush 26,commutator ring 2?, terminal 28, conductors 29 and 3d, the heat ingelement l0, conductors 33, 36, terminal 31, commutator ring 38, brush35, conductors it, il, 62, switch blade is and conductor 46 to the otherside of the line. A circuit has been traced to the heating element it.The other heating elements ll, l2 and B3 are tapped ofi conductors 2sand 3%, audit is believed unnecessary to trace each of these individualcircuits. It will be obvious from the foregoing that upon the closing ofswitch i9, current will be supplied to the heating elements it, ll, l2and i3 thereby to dissipate the wax at certain areas of the papercorresponding to the location of the heating elements, these areaseventually to receive adhesive as will be apparent hereinafter.

It is also necessary in preparing the waxed web for tubing to providethe web with a longitudinal unwaxed stripe 50 for receiving adhesive. 1accomplish this by providing an electrically heated disc 5| at one endof the cylinder. This disc may be removable so as to substitute wider ornarrower discs to provide difierent width stripes, and receives itsheating current from the commutator ring 2? through conductor 52, thedisc 5i, conductor 53 and commutator ring 38.

It will be apparent from the description thus far that as the web passesabout the cylinder with the circuit closed, the web will be providedwith transverse stripes and with a longitudinal stripe adjacent one edgeof the web where the wax has been dissipated.

The web next passes over a heating box 6t and from thence to a waxwiping device 6|. The wax wiping device comprises a disc of felt orother suitable material positioned so as to follow the longitudinalstripe 50 of the web, and as the web engages this disc, thedissipated'or softened wax is removed leaving an area extending longi:

. tudinally of the web free of wax.

On the same shaft with the disc 6| I provide a roller 65 provided with apad 66 of felt or other suitable material projecting radially therefromand extending longitudinally of the roller. This pad is of the samelength and width as the so-ftened spaces [4 leftby the heating elementsl8, it, I! and I3, and the speed of rotation of the roller 65 is sotimed that the pad 66 will engage these transverse spaces as the webadvances, to remove the softened wax therefrom as the web passes over aroller which lies adjacent the mechanism just described.

Below the wax removing mechanism just described I provide a trough "IIin which is mounted referred to and its circuit -is closed whentheswitch i9 is closed.

After the web leaves the roller 10 it passes about rollers 80 and Bi,thence past a paste applying device 82, which may be of the usualconstruction, where adhesive is applied in the spaces and stripe fromwhich the wax has been removed.

The web then passes to tube forming mechanism, not shown, but which maybe of usual construction.

While I have illustrated one embodiment of a device suitable forcarrying out my invention, it is to be understood that various changesand modifications may be made therein without departing from the spiritand scope of my invention.

What I claim is:-- I

1. Apparatus of the class described, comprising in combination means foreffecting the continuousadvance of a waxed paper web, heating elementsin the path of said traveling web for fusin the surface wax of said webat spaced intervals, and means in the path of said web, for subsequently removing the fused wax.

2. Apparatus of the class described, comprising in combination means foreffecting the continuous advance of a waxed paper web, a plurality ofheating elements in the pathof said advancing web for fusing the surfacewax of said web at spaced intervals, means in the path of the web forsubsequently removing the fused wax, and

' means for subsequently applying adhesive to the web at the de-waxedareas.

3. Apparatus of the class described, comprising in combination means foreffecting the continuous advance of a waxed paper web, a plurality ofelectrically heated elements in the path of said advancing web forfusing the surface wax of said web at spaced intervals, means in thepath of the web for subsequently removing the fused wax, and means forsubsequently applying adhesive to the web at the de-wa'xed areas.

4. Apparatus of the class described, comprising in combination means foreffecting the continuous advance of a waxed paper web, electricallyheated elements in the path of said traveling web for fusing the surfacewax of said web at spaced intervals, and heated means in the path ofsaid web for subsequently removing the fused wax.

5. Apparatus ofthe class described, comprising in combination means forcontinuously advancing a web of waxed paper, a plurality of heatingelements in the path of said traveling web for fusing the surface wax ofsaid webat predetermined.

areas, means for subsequently removing the fused wax from said areas,and means in the path of said traveling web for maintaining the. waxfused at said areas in its travel from said heating elements to said waxremoving means.

6. Apparatus of the class described, comprising a rotating drum, equallyspaced heating elements amazes at the periphery of said drum, anelectric circuit including said heating elements for energizing,

said drum to effect fusing of the surface wax thereof at spaced areascorresponding to said heating elements and along an area correspondingto said disc, and extending continuously lengthwise of said web. a

7.. Apparatus for the treatment of waxed paper comprising a rotatabledrum, equally spaced heating elements removably secured in the peripheryof said drum, an electricncircuit including said heating elements forenergizing the same, a disc in said electric circuit and heated therebyand removably. carried by said drum, and means .for advancing said papercontinuously about said drum in operative relation to said heatingelements and disc, thereby to fuse the surface wax of said paper atspaced areas corresponding to the location of said heating elements andalong an area corresponding to said disc, and extending continuouslylengthwise of the paper.

8. Apparatus for the treatment of waxed paper comprising a rotatingdrum, equally spaced channels in the periphery of said drum, heatingelements removably secured in said channels, an electric circuitincluding said. heating elements for energizing said elements, a disc insaid electric circuit and heated thereby and removably secured to oneend of said drum, and means for passing said paper about said drum toeffect fusing of the surface wax of the paper at spaced intervalscorresponding to said heating elements and along-an area correspondingto said disc, and extending continuously lengthwise of the papercomprising a plurality of heating elements in the path of saidweb forfusing the surface wax of said web at spacedintervals, and a rotatingmember carrying a heated wiper for intermittent engagement with thesurface of the web forremoving the fused wax. I

10.. Apparatus for the treatment of waxed paper comprising a pluralityof heating elements in the path of said traveling web for fusing thesurface w'ax of said web at predetermined areas, and a roller in thepath of the web, said roller carrying heated pads and being so timed asto engage the fused areas for removing the fused wax, and means forapplying adhesive to the web vin the spaces from which the wax has beenremoved. I a

11. Apparatus. for the treatment of waxed 9. Apparatus for the treatmentof waxed paper.

paper comprising a plurality of heating elements in the path 'of saidtraveling web ,for fusing the surface wax of said web at predeterminedareas, a roller carrying wipers mounted in the path of the web, saidwipers contacting the web at the fused areas for removing the waxthereat, a heated roller in contact with said wipers. for

maintaining the same heated and a scraper in engagement with said heatedroller for removing the fused wax therefrom, andv heated meansintermediate said members andwipers for main- .taining the fusedsurfaces molten during the travel of said web from said heating elementsto said wax removing means. a

. ADOLPH POI'DEVIN.

